Shaft-coupling.



PATENTED MAB. 19, 1907.

J. P. KAYWA-RD.. SHAFT COUPLING. APPLIoAToN FILED PEB. a. 1905.

frs

' roll. In Grifiins patent, No.

i `applied to shown as having Babbitt-metal bearings for connection with the accompanying i clearness. Fig 3 the upper end of the shaftcross 'head, andV-` close of this specification.

Q UNITED STATESQPIILIEXT JosiAu P. HAYwARn, OF MALDEN, MASSACHUSETTS,

PLmvERTZER COMPANY, or BOSTON, ins- AssIGXME-N'rs, To BRADLEY sAcHUsETTs, A CORPORATION or OFFICE.

AssicNoR, BY MEsNE MAINE.

s'HAFT-couPLlNe..

T0 all whom it 'may concern: l Be it known that I, JosrAH P. HAYwARD, a' citizen of the United States,residing at Mall den, county of Middlesex, Stat-e of Massachusetts, have invented a certain new and useful Improvement in Shaft-Couplings, of which the following is a specification, reference being had therein to the accompanying drawings. Y

My invention is an improvement upon the device shown in Letters Patent of the United States'No. 721,035, 'granted to Edwin C. Grifiin, dated February 7, 1903, for a-shaftcoupling.' In that patent there is shown a shaft-coupling especially adapted for use in grinding-mills-suc 1for instance, as is shown in Griffins prior patent, No. 449,118, dated'March 31, 1891;- for a grinding- Where a very heavy strain is placed upon the universal joint which supports the grinding- 721,035, the invention there described is also shown as shafts for power transmission. My invention has for its object lto provide a bearing for'certain parts ofthe universal coupling shown in Griifins shaft-couplino' patent which shall wear less rapidly an 'which` lwhen vWorn may be more easily rplaced. Griffins .shaft-coupling patent referred-to the segmental members, which form" a'part of the universal coupling, are tion provides a more satisfactory bearing to i replace'this Babbitt metal. l

My invention will Y dily understood from the lfollowing'.

.their curved Wearing-surfaces. My inv'enbe 'rea description, taken in drawings, andthe novel features thereof are pointed out and clearly defined in the claims at the Figure 1 is a a grinding- Referring to the drawings, section of the upper portion of mill supplied with my improved shaft-coupling bearing. Fig. 2 is a plan view thereof, one-half of the cap being removed for greater is a view in perspective of segmental pieces assembled. Fig'.' 4 is ai view in perspective of the bearing-piece for'1 the segmentalmember.

In the drawings,

referring more particu- Awhich is provided with trunnions 13.

l cross-head 12.

i cross-section somewhat si Patented March` 19, 19'07.-

larly to Figs.` 1 and 2, the upper portion of the frame-supports is indicated at 5-. The rim of the rotating pulley is shoun at 6 and the body thereof at 7, the two being attached by rivets 8. The lower part of the said rbody 7 is formed into a cone-bearing 9, 'resting `upon a corresponding conical surface 10,

supported by the frame of the machine. The cone-bearing 9 is shown in the drawings as having a layer of Babbitt metal interposed between it and the corresponding conical surface 10. The body 7 Of the pulley is formed with an interior cavity 71, Within which the supporting members of the universal coupling are received. These -me'mbers are the same as shown in the Griffin shaft-coupling patent hereinbefore referred to.

The grinding-roll shaft is shown at 11and carries on'its upper end the cross-head 12,

Segmentalpieces or members 14 are slipped Onto each of the trurmions 18 and are formed with their outer surfaces' corresponding' to the arc of a circle centered at the center ofthe These parts-viz., the shaft, cross-head, trunnions, and segmental piecesform the movable parts of the driven member, while the pulley-rim 6, body 7, and bearings 9 form the movable parts of the driving member. All of the parts thus far described are the same in function and general construction as in the Griffin patent, No.721,035, above referred to, and form no part of my present invention, being shown and described here for the sake of clearness.

The movable parts of the driven member are supported in the driving member in the following manner: The central portion of the body 7 is cored out, as before stated, so that it has a central cavity 71, having a milar to the central horizontal cross-section of the movable Vertical side pieces 14 are the body by 15, (see Fig. 2,)

driven member. bearings for the segmentalY forme in this cavity 71 in means of vertical side pieces slipped walls of the cavity 71 in the body 7. These side pieces 15 fit closely against the vertical side surfaces of the segmental member 14 and transmitthe turning force from the pulpart of the `ley to the driven shaft.

into dovetails 151, cut inthe side i IOO - 15, the .movable bearing `The movable bearing The curved faces of the segmental mem- I bers 14 bear against similar faces formed on l the movable bearing members 16, (see Fig. 4,) which are 'shaped to fit into the cavity 71 in thebody 7 at right angles with the side pieces 15. These movable bearing members rest upon a seatV 17, slightly raised above the I lower surface of the cavity 71 for convenience l in finishing the parts. The upper part ofthe l movable bearing member 16 is furnished l with a shoulder 18, upon which the-coverpiece 191, Which incloses thecoupling, rests. l member 16 also extends l somewhat above the shoulder 18, as shown atl 19, thereby providing an additional bearingsurface for the curved ends of the segmental members 1.4, and thus allowing the cross-head I 12 and segmental members 14a wider range l bf movement about the center. slight clearance 20 between the portion 19 of the movable bearingpiece 18 and the inte- I rior surface of the cover 191 to permit suit- V able adjustment of the movable bearingpiece 16. The movable bearing member 16 ,is also furnished with wings 21, (see Figs. 2 and 4,) which serve to hold the side pieces 15 vclosely into the dovetails 151 when pressed into its normal position.

The movable bearing member 16 and the side pieces 15 are held in place by the Wedge i 22, which for convenience I make slightly shorter than the movable bearing member 16. The said wedge 22 iits between the vertical interior Wall 72 of the cavity 71 and an inclined surface 161 formed on the back side of the movable bearing member 16. I rovide the Wedge 22 with a hole 23, drilled and tapped for the reception of an eyebolt as a means of removing the wedge when desired. The wedge 22 is of such va height that when the movable 'bearing member 16 is forced into its proper position the upper surface of the,v4 wedge 22 is substantially on a level with the shoulder 18 on the movable bearing member 16 and with the upper surface of the body 7, against which surfaces the'under face of the cover 19 fits. It will thus be seen that mthe wedge 2-2 is held securely in place by the cover 19 when the same is fastened down b the bolts 24. Should the surfaces ofthe wedge 22 or"movab.l.e bearing member 1 5 wear so that the Wedge dropsdown to a lower position, I fill in the space resulting between the upper edge of the Wedge and the under face of the cover with shims or linersof any Suitable material.

Bythe construction which I have described I am enabled to replace very quickly the parts of my universal coupling when they become Worn, these parts being the side pieces members 16, and

I provide a l' .cavity in the driving ase the segmental members'14. I also am ableto do away with the use of babbitt in these bearings, for I iind it convenient to make vthe pieces referred to of cast-iron, which affords a very satisfactory wearing-surface. I have shown my invention as applied to the sh aft which supports the rotatablegrinding-roll of a grinding-mill 'because that is the form in which my invention has beenput into actual use; but it is evident that it may be embodied in ashaft-coupling'where it is desired tol connect `two rotating'shafts 4which may not always be in 'alinement with each other. The invention may lalso be embodied in from the sp-irit of my invention.

What `I claim is` 1. In a universal shaft-coupling, the combination with op'positely-located segmental other forms without departing members, of removable bearing members co4 operating with the curved lfaces of the said segmental membersand furnishing the .bearing-surface for the curved segmental members, and"removable side pieces coperatinot ith theside faces of the I said segmental members.

- 2. In a universal shaft-coupling, the combination with oppo'sitjely-located'segmental` members, of removable bearing memberscooperating .with the curved faces 'of the said segmental members, coperatii'i'g with the segmental members and holding means for the said bearingfmembers and side pieces.

3. In a universal shaftcoupling, lthe comv bination with oppositely-located segmental members, of removable-bearmg members cofaces of the said .removable side pieces i sidejfaces ofthe said operating with .the curved faces of the said segmental members, removable side vrpieces cooperating with the side; faces of the said segmental members',' holding means for the said lbearing members 'and side pieces, and wedges for the said bearing members 'and' -side pieces. j

4. In a universal shaft-coupling, the combination with a :driving member having a Icavity therein, and oppositely-located segmental members Within the ysaid cavity, of removable bearingwith the curved faces bers,' and' removable with the-side faces members,l dovetailed of thesegmental memof the said segmental into the walls of the member.

In testimony whereof I aflix my in presence of two witnesses.

JosiAH P. HAYWARD.' ilvitnesses: I

GEORGE P. DIRE,- ROBERT WALLACE.

members coperatingf 'side pieces cooperating 115 signaturel 

